Cutting from the 'New York Times', 2 April 1882, concerning Henry Draper's photographs of the spectrum of the Orion Nebula.

Correspondence with Dr N. Konkoly of Umgarn concerning the spectrum and bright lines of Eta Ceti.

Correspondence with A.E. Buttress on whether M42 is gaseous; a letter from C. Pritchard, Oxford, asking for a measure of the motion of Eta Tauri; correspondence with W. Huggins on Pickering's wavelengths; and correspondence with Sir George Airy regarding observations of proper motion. The letters date from 1884.

Letter from C. Pritchard regarding stellar photometry, 1885.

Correspondence with Dr D.L. Birkenmeyer regarding measures of Zeta Ursae Majoris and with Dr W. Huggins concerning measures of Sirius, 1886.

Correspondence with Maxwell Hall and J. Bone concerning observations of the motions of stars in the line of sight, 1888.

Letter from Mrs B. Paul asking if there is any difference in colour between Gamma 1 and Gamma 2 Virginis, and a letter from W.J. Dibdin asking for information about stellar photometry, 1888.

Undated memorandum concerning the motion of various stars in the line of sight as measured at Greenwich.

Undated memorandum by E.W. Maunder concerning the spectrum of M42 in Orion.

Correspondence with W. Huggins concerning corrections of the 15-inch achromatic lens, 1886.

Correspondence with J. Janssen of Paris, in French, concerning the 'Congres International de Photographie Celeste', 1889.

Miscellaneous memoranda concerning the motions of stars in the line of sight, 1890.

Proof of a paper by J.N. Lockyer 'On the Chief Line in the Spectrum of the Nebulae' and correspondence with the Revd W. Sidegreaves regarding his election as a Fellow of the Royal Society and on solar and stellar spectra, with photographs of the solar spectrum and that of Sirius. The items date from 1890.

Papers by J.T. Skidmore concerning his theory of comets and newspaper cuttings on C.S. Wilkinson's talk to the Royal Society of New South Wales on the formation of comets, 1881.